OK, I think I reached a good compromise between all of these approaches and domino's well-taken point that orcs are thrown into the mix. Orcs normally have -2 to all three mental stats, and half-orcs only two. If we make the Orcs have -2 to two mental stats of their choice, as per Mouseferatu's suggestion for half-orcs, then the Half-Orcs have -2 to one mental stat of their choice, and we stick them all with Spellcasting Impotence, so that if they put their newly relieved stat into Charisma, they still keep with the flavour of weak at directly casting spells. Also, since our orcs basically turn all the tenets of orcdom upside-down (read the society description for chuckles to see that we have directly opposed pretty-much everything there, which is a good thing in my book) our orcs have cultured gardens and the like, so they probably don't have Light Sensitivity, so I eliminated Darkvision and Light Sensitivity from both races (we need more than two races without Darkvision anyway to make the game more interesting!). Thanks to this set-up, we may see NPC half-orc bards who are unable to cast spells due to Spellcasting Impotence, which in my opinion makes for a better aristocratic character or officer than the Aristocrat class (rally the troops with inspiring oratory, but can't fight as well as a front-liner).
This is still open to my changing it, since the Orc and half-orc definitions here are so crucial to Eyros, just taking a stab:
Eyrian Orc Traits:
--+4 Strength, -2 to any two of Intelligence, Wisdom, and Charisma
--An Eyrian orc's base land speed is 30 feet
--Spellcasting Impotence (Ex): Eyrian orcs suffer from a genetic mutation caused by the antimagic protections used by their ancestors against the elves long ago. Treat their base spellcasting stat as 2 lower for purposes of determining bonus spells and DCs.
--Automatic Languages: Vulgar Eyrian; Bonus Languages: High Eyrian, Orc, Human, Elven, Gnome
--Favoured Class: Fighter
Eyrian Half-Orc Traits:
--+2 Strength, -2 to any one of Intelligence, Wisdom, and Charisma
--An Eyrian orc's base land speed is 30 feet
--Spellcasting Impotence (Ex): Eyrian half-orcs suffer from a genetic mutation caused by the antimagic protections used by their ancestors against the elves long ago. Treat their base spellcasting stat as 2 lower for purposes of determining bonus spells and DCs.
--Automatic Languages: Vulgar Eyrian; Bonus Languages: High Eyrian, Orc, Human, Elven, Gnome
--Favoured Class: Bard